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Geographic Regions | 12 Months Ended
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Sep. 30, 2019
Segments Geographical Areas [Abstract] |
Geographic Regions | 20. Geographic Regions We have continuing operations in the United States, China and France, as well as satellite offices in Europe and Asia. Revenues, operating income (loss) and identifiable assets by geographic region are as follows (in thousands):
|  | Years Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Net revenue: |  |  |  |  |  |  |  |  |  |  |  |
United States |  | $ | 65,942 |  |  | $ | 72,753 |  |  | $ | 60,952 |
China |  |  | 9,500 |  |  |  | 17,634 |  |  |  | 12,673 |
France |  |  | 4,898 |  |  |  | 6,129 |  |  |  | 5,588 |
Other |  |  | 4,695 |  |  |  | 3,537 |  |  |  | 3,860 |
|  | $ | 85,035 |  |  | $ | 100,053 |  |  | $ | 83,073 |
Operating income (loss): |  |  |  |  |  |  |  |  |  |  |  |
United States |  | $ | 726 |  |  | $ | 2,755 |  |  | $ | (51 | )
China |  |  | 3,686 |  |  |  | 5,445 |  |  |  | 3,647 |
France |  |  | (786 | ) |  |  | (3,058 | ) |  |  | (1,000 | )
Other |  |  | 1,290 |  |  |  | 930 |  |  |  | 1,045 |
|  | $ | 4,916 |  |  | $ | 6,072 |  |  | $ | 3,641 |
|  | As of September 30, |
|  | 2019 |  |  | 2018 |
Net property, plant and equipment: |  |  |  |  |  |  |  |
United States |  | $ | 9,893 |  |  | $ | 10,039 |
China |  |  | 236 |  |  |  | 293 |
France |  |  | 88 |  |  |  | 177 |
|  | $ | 10,217 |  |  | $ | 10,509 |

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